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  1. hhughes2589

    Hi, I'm looking for some help ma

    Hi, I'm looking for some help making a convincing argument regarding a butterfly valve that utilizes EPDM to achieve an enhanced seal (improves with pressure) operating in HVAC duty (water, glycol @ <250F) versus PTFE(teflon). Which seems to have a mysterious "buzz" with specifying engineers...

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